Urusei Yatsura

Ataru Moroboshi

The protagonist and a hopeless womanizer high school student.

Lum

An alien Oni girl who falls in love with Ataru and lives on Earth as heroine.

Takeshi Mendo

Ataru's rival and heir to the wealthy Mendo family at Tomobiki High School.

Shinobu Miyake

Ataru's childhood friend and former girlfriend, known for her great strength.

Ryunosuke Fujinami

A transfer student female raised as a boy with a tough personality.

Kosuke Shirai

Ataru's best friend and a large boy who is a notorious troublemaker in class.

Megane

Leader of Lum's guard with a strong personality who wants to protect Lum.

Paama

Slim member of Lum's guard with a gluttonous girlfriend.

Chibi

Short and crybaby boy of Lum's guard mostly acting as a errand runner.

Kakugari

Lum's guard member with a crew cut and large build, relatively low-profile.

Sakuranbo (Cherry)

A wandering monk with spiritual powers who often prophesies and causes trouble around Ataru.

Sakura

Cherry's niece and shrine maiden who exorcises spirits and school nurse at Tomobiki High.

Ten

Lum’s young cousin, an Oni child who speaks Kansai dialect and breathes fire.

Ran

Lum's childhood friend, an alien with dual personality who can absorb youth through kissing.

Benten

Lum's childhood friend, one of the Seven Lucky Gods, a strong fighter alien.

Oyuki

Queen of Neptune and a Snow Woman who controls cold and powerful abilities.

Rei

Lum's former fiancé, a handsome Oni who is a big eater and can transform into a bull demon.

Sugaa

Leader of the delinquent trio with the special ability of camouflage.

Jinjaa

Member of the delinquent trio who can feign death convincingly.

Peppaa

Member of the delinquent trio with the ability to shed her skin.

Onsen Mark

Teacher of Tomobiki High and Ataru's homeroom teacher, nicknamed Onsen Mark.

Hanawa

New teacher at Tomobiki High, homeroom teacher for Ataru's class, teaches classics.

Principal

Principal of Tomobiki High with a broad and tolerant nature.

Ryoko Mendo

Younger sister of Takeshi Mendo, dislikes boredom and teases her brother.

Tobimaro Mizunokoji

Takeshi Mendo's childhood friend, clumsy heir to Mizunokoji sports conglomerate.

Asuka Mizunokoji

Younger sister of Tobimaro with extreme brother complex and super strength.

Mako

Childhood friend of Ten, a precocious kindergartener who is betrothed to Ten.

Inaba

Person from the Destiny Manufacturing Bureau who makes dreamworld doorknobs and is romantically involved with Shinobu.

Shingo

Grandson of Mendo family's gardener with electrical resistance and espionage duties.

Saizou-jii

Mendo family's gardener, Shingo's grandfather, who is somewhat senile.

Nagisa Shiowatari

Daughter of beachside shop owner, becomes Ryunosuke’s fiancée after becoming a ghost.

Lupa

Lum’s fiancé from the dark world and richest pig owner in the stars.

Karura

Resident of the dark world, Lupa’s childhood friend who forcibly betrothed herself to him.

Eld Rosenbach

The 888th queen of the El star who promised marriage to Ataru 11 years ago.

Magician Ruu

A boy disguised as a clown with special powers aiming to separate Lum from Ataru.

Rupika

A queen who falls for her childhood friend Rio and attempts to use a love potion.